usaa brings advice. call or visit us online. we're ready to help. >>> both flu season is upon us and the number of people who have it across the country is growing. it's something we hear about every year, but how much do you really know about the virus and what can you do to avoid it? cnn's chief medical correspondent dr. sanjay gupta has the details. >> you know, one thing about the flu season this year is that people are paying about as much attention to it as they have in years past which probably isn't enough. about a third of people have gotten their flu shots so far that need it. so that's a little bit of an indicator. i'll talk about that in a second. i want to point out, miguel, this is a particularly early flu season. we're thinking about the peak of cases usually occurs a little later in the winter. we're already starting to see quite a bit of flu activity. you can see some of the numbers there. remember, miguel, tens of thousands of people still die from the flu every year. one thing that i think is worth pointing ou